| Actress Katic of TV's "Castle" | 44 |
| Actress Kay of "Breezy," 1973 | 39 |
| Actress Kay of "Rich Man, Poor Man" | 45 |
| Actress Kayla of "The Vampire Diaries" | 48 |
| Actress Keanan of "My Two Dads" | 41 |
| Actress Kedrova and singer McCann | 33 |
| Actress Kedrova of "Torn Curtain" | 43 |
| Actress Kelly of "Chaplin" | 36 |
| Actress Kelly of "One Tree Hill" | 42 |
| Actress Kelly of "The Roommate" | 41 |
| Actress Kemper of "The Office" | 40 |
| Actress Kidder of "Superman" | 38 |
| Actress Kikuchi of “Babel” | 34 |
| Actress Kimberly of "Close to Home" | 45 |
| Actress Kirshner of "The Black Dahlia" | 48 |
| Actress Kirsten of "Spider-Man" | 41 |
| Actress known as "Hot Lips" | 37 |
| Actress Krakowski of "30 Rock" | 40 |
| Actress Kristen of "S.N.L." | 37 |
| Actress Kruger of "Unknown" | 37 |
| Actress Kunis of "Black Swan" | 39 |
| Actress Kunis of "That '70s Show" | 47 |
| Actress Kurylenko of "Oblivion" | 41 |
| Actress Lanchester, who married Charles Laughton | 48 |
| Actress Larter of "Heroes" | 36 |
| Actress Lathan of "The Cleveland Show" | 48 |
| Actress Laura of "E.R." | 33 |
| Actress Laura of "Recount" | 36 |
| Actress Lauren on "The Walking Dead" | 46 |
| Actress Laurie of "Roseanne" | 38 |
| Actress Löwensohn of "Nadja" | 41 |
| Actress Löwensohn of "Nadja," 1994 | 47 |
| Actress L”wensohn of "Nadja" | 42 |
| Actress Lee of TV's Pantomime Quiz | 42 |
| Actress Lee of "Funny Face" | 37 |
| Actress Lena of ''Chocolat'' | 44 |
| Actress Lena of "Havana" | 34 |
| Actress Lena of "Romeo is Bleeding" | 45 |
| Actress Lena Olin, e.g., by birth | 33 |
| Actress Lewis of "Natural Born Killers" | 49 |
| Actress Linda of "Dynasty" | 36 |
| Actress Lindsay of "Freaky Friday" | 44 |
| Actress Lindsay of "The Parent Trap" | 46 |
| Actress Linney of "The Big C" | 39 |
| Actress Liv of "A Bridge Too Far" | 43 |
| Actress Lonette of "Malcolm X" | 40 |
| Actress Long of "Are We There Yet?" | 45 |
| Actress Long of "Big Momma's House" | 49 |
| Actress Long of "Boyz N the Hood" | 43 |
| Actress Long of "Soul Food" | 37 |
| Actress Longoria who divorced Tony Parker | 41 |
| Actress Loretta of "M*A*S*H" | 38 |
| Actress Loretta of "MASH" | 35 |
| Actress Lotte who was married to Kurt Weill | 43 |
| Actress Loughlin of "90210" | 37 |
| Actress Loughlin of "Full House" | 42 |
| Actress Lucy of "Charlie's Angels" | 48 |
| Actress Lucy of "Elementary" | 38 |
| Actress Lupino and writer Tarbell | 33 |
| Actress Lupino who lived in Malibu | 34 |
| Actress Lyon, who played Lolita, 1962 | 37 |
| Actress MacDowell of "Groundhog Day" | 46 |
| Actress Madchen of "Twin Peaks" | 41 |
| Actress Madeline of "Blazing Saddles" | 47 |
| Actress Maestro of "Poseidon" | 39 |
| Actress Malone of "Stepmom" | 37 |
| Actress Mara of "House of Cards" | 42 |
| Actress Marceau of "Braveheart" | 41 |
| Actress Marisa of "The Wrestler" | 42 |
| Actress married to Steven Spielberg | 35 |
| Actress married to the singer Sting | 35 |
| Actress Martha of "Some Came Running" | 47 |
| Actress Mary Martin's actor son | 35 |
| Actress Mary of "Sons and Lovers" | 43 |
| Actress Mary, 'America's Sweetheart' | 48 |
| Actress Mason and playwright Norman | 35 |
| Actress Massen of "Tokyo Rose" | 40 |
| Actress Massey of "International Lady" | 48 |
| Actress Massey of "Love Happy" | 40 |
| Actress Maureen of "Nuts" | 35 |
| Actress Mayim of "The Big Bang Theory" | 48 |
| Actress Mazar of "Entourage" | 38 |
| Actress Mazar of HBO's "Entourage" | 48 |
| Actress Meg or her sister Jennifer | 34 |
| Actress Mendes of ''Hitch'' | 43 |
| Actress Mendes of "Hitch" | 35 |
| Actress Merkel of "The Parent Trap" | 45 |
| Actress Merrill of "BUtterfield 8" | 44 |
| Actress Merrill of "Desk Set" | 39 |
| Actress Messing of "Will & Grace" | 47 |
| Actress Metcalf of "Roseanne" | 39 |
| Actress Meyer of "Saw" films | 38 |
| Actress Michele of "Glee" | 35 |
| Actress Milano of "Charmed" | 37 |
| Actress Miles and author Brittain | 33 |
| Actress Miles whose films produce warm fuzzies? | 47 |
| Actress Miller of "Alfie" | 35 |
| Actress Mills after marrying author Alex? | 41 |
| Actress Mills of "The Parent Trap" | 44 |
| Actress Mimieux in "The Time Machine" | 47 |